38H2NM

critical parts heavy and transport engineering type axles, shafts and other highly loaded parts and components used in low temperature conditions.

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Structural steel	Alloyed structural steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
TU 24.11.01.073-86	94.85–96.41	0.17–0.37	0.5–0.8	1.8–2.3	0.6–0.9	< 0.03	0.32–0.42	< 0.03	0.2–0.3

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Forgings		< 300			830	680	12	38	500	Tempering 850-870 ° C, 590-620 ° C and Holidays
Forgings		300–500			740	580	12	35	450	Tempering 850-870 ° C, 590-620 ° C and Holidays
Forgings		500–800			700	530	10	30	400	Tempering 850-870 ° C, 590-620 ° C and Holidays

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy		normalization	207–235
Alloy		Hardening, average vacation	237–321

Technological Properties

Flake Susceptibility	Propensity to temper brittleness
Flake Susceptibility	Propensity to temper brittleness
sensitive	inclined

Analogues

Germany
Germany
G 36 CrNiMo 4

Standards

Standard	Description
Standard	Description
TU 24.11.01.073-86

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness